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Wyświetlanie 1-15 z 35
Tytuł:
Up-regulation of endothelin-1 in gastric mucosal inflammatory responses to Helicobacter pylori lipopolysaccharide: effect of omeprazole and sucralfate
Autorzy:
Slomiany, B.L.
Piotrowski, J.
Slomiany, A.
Powiązania:
https://bibliotekanauki.pl/articles/69124.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
epithelial cell
gastric mucosa
inflammation
Helicobacter pylori
omeprazole
sucralfate
lipopolysaccharide
tumour necrosis factor-alpha
gastric disease
acute gastritis
endothelin-1
antiulcer agent
apoptosis
Źródło:
Journal of Physiology and Pharmacology; 2000, 51, 2
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of complement activity in the sensitivity of Salmonella O48 strains with sialic acid-containing lipopolysaccharides to the bactericidal action of normal bovine serum
Autorzy:
Bugla-Ploskonska, G
Futoma-Koloch, B.
Rybka, J.
Gamian, A.
Doroszkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/32048.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bacterial strain
Salmonella
normal bovine serum
sensitivity
sialic acid
lipopolysaccharide
bactericidal activity
animal tissue
glycoconjugation
microorganism
Enterobacteriaceae
Opis:
Sialic acids are important constituents of animal tissue glycoconjugates and are also present in the antigens of some bacterial strains. Capsular polysaccharides with sialic acid (NeuAc) have been extensively studied with regard to sensitivity to the bactericidal action of serum, whereas little is known in this regard about lipopolysaccharides (LPS) which contain NeuAc. Strains of Salmonella 048, able to infect animals and containing the same structures of LPS with NeuAc, were examined for their susceptibility to the bactericidal action of normal bovine serum (NBS). The strains showed varied sensitivity to the bactericidal action of NBS, which indicates that the expression of LPS containing NeuAc residues is not critical for the strains' resistance to the serum's activity. In this study the mechanisms of complement activation responsible for killing serum-sensitive Salmonella 048 rods by NBS were also established. Three such mechanisms were distinguished: activation of the classi- cal/lectin pathways, important (decisive) in the bactericidal mechanism of complement activation, parallel activation of the classical/lectin and alternative pathways, and independent activation of the classical and lectin or the alternative pathway.
Źródło:
Polish Journal of Veterinary Sciences; 2010, 13, 1; 53-62
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The amide of galacturonic acid with lysine as an immunodominant component of the lipopolysaccharide core region from Proteus penneri 42 strain
Autorzy:
Palusiak, Agata
Maciejewska, Anna
Ługowski, Czesław
Różalski, Antoni
Powiązania:
https://bibliotekanauki.pl/articles/1039351.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
amide of galacturonic acid with lysine
anti-conjugate serum
core region
lipopolysaccharide
Proteus
Opis:
Most Proteus lipopolysaccharides (LPSs) contain uronic acids or their amides with different amino acids, which together with other negatively charged components account for the acidic character of such LPS molecules. Previous studies have shown the significance of an amide of galacturonic acid with lysine [D-GalA(L-Lys)] for serological specificity of O-antigens from few P. mirabilis strains. In this work, the immunodominant role of GalALys was indicated for the P. penneri 42 LPS core region. The studies also showed the serological identity of core oligosaccharides from P. penneri 42 (O71), P. mirabilis 51/57 (O28) and R14/S1959 strains.
Źródło:
Acta Biochimica Polonica; 2014, 61, 1; 129-132
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on the effects of lipopolysaccharide on lipid peroxidation of erythrocyte and its reversal by mannitol and glycerol
Autorzy:
Bhattacharyya, J.
Datta, A.G.
Powiązania:
https://bibliotekanauki.pl/articles/70788.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
infection
mannitol
lipopolysaccharide
sepsis
erythrocyte
blood
septic shock
lipid peroxidation
glycerol
Źródło:
Journal of Physiology and Pharmacology; 2001, 52, 1
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural and serological characterization of Hafnia alvei lipopolysaccharide core region
Autorzy:
Ługowski, Czesław
Niedziela, Tomasz
Jachymek, Wojciech
Klonowska, Agnieszka
Czarny, Anna
Rowiński, Stefan
Petersson, Carl
Kenne, Lennart
Powiązania:
https://bibliotekanauki.pl/articles/1045281.pdf
Data publikacji:
1995
Wydawca:
Polskie Towarzystwo Biochemiczne
Źródło:
Acta Biochimica Polonica; 1995, 42, 1; 51-54
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spektrometria mas w badaniach skażeń mikrobiologicznych środowiska. Część 2, Kwasy 3-hydroksytłuszczowe jako biomarkery lipopolisacharydów (endotoksyn) ścian komórkowych bakterii gramujemnych
Investigetion (detection) of environment microbial contamination by mass spectrometry. Part 2, 3-hydroxy fatty acids as a lipopolysaccharides (endotoxin) biomarkers of the gram-negative bacterial cell walls
Autorzy:
Bal, K.
Mielniczuk, Z.
Powiązania:
https://bibliotekanauki.pl/articles/172406.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
LPS
lipopolisacharyd
chromatografia gazowa
spektrometria mas
lipopolysaccharide
gas chromatography
mass spectrometry
Opis:
Microorganisms synthesize several monomeric chemical structures that are not found elsewhere in nature, e.g. muramic acid (an amino sugar) and D-amino acids (D-alanine and D-glutamic acid) are ubiquitous in bacterial peptidoglycan (PG). Characteristic sugars (e.g. heptoses) and 3-hydroxylated fatty acids are found in the endotoxin (lipopolysaccharide, LPS) of gram-negative bacteria [1]. The best way to protect against environment contamination is microbial control. Methods in current use for monitoring microorganisms mainly include culture and direct microscopy. However, several factors, including samples collection, growth conditions, incubation temperature and interaction between different organisms all affected the culture results. Additionally, culture based methods can detect only viable organisms and they are also time consuming, sometimes taking days or weeks. However, since both living and dead microorganisms express irritating and toxic structures, they should all be taken into consideration. Muramic acid has been suggested for use as a chemical marker in gas chromatography-mass spectrometry (GC-MS) determination of bacterial peptidoglycan [2]. While 3-hydroxylated fatty acids are the best proposition for use as a chemical markers in gas chromatography-mass spectrometry determination of bacterial lipopolysaccharide (endotoxin) of gram-negative bacteria in both clinical and environmental samples [38]. Two derivatives have been applied, including the trimethylsilyl (TMS) and pentafluorobenzoyl (PFBO) derivatives [80]. Both derivatives (TMS and PFBO) have been proven suitable for use with GC-ion-trap tandem MS [3]. The aim of our proposition is trial of application of gas chromatography-mass spectrometry (GC-MS) method as an alternative or complement to culturing, microscopy and other assays for detection, characterization and monitoring of microbial contamination of environment (e.g. water, air, air-conditioning systems), contamination of biochemical and food production chain processes, packaging for foodstuffs etc. by analysis of bacterial 3-hydroxylated fatty acids as a biochemical markers. A method is described for the quantitation of methyl esters of 3-hydroxyacids, markers of bacterial lipopolysaccharide (endotoxin), as trimethylsilyl or pentafluorobenzoyl derivatives using GC/MS method. The described methods are quick and simple, can be applied for monitoring microbial contamination directly, without prior culturing, in complex environmental samples. This method can be also applied for testing processes of cleaning and disinfections on packaging materials or on both packaging materials/foodstuffs in order to decrease their microbial load and thus to ensure better shelf-life. [1] Z. Mielniczuk, K. Bal, Spektrometria mas w badaniach skażeń mikrobiologicznych środowiska. Część I. Kwas muraminowy jako biomarker ścian komórkowych bakterii, Wiad. Chem., 2012, 66, 445. [2] K. Bal, L. Larsson, E. Mielniczuk, Z. Mielniczuk, Structure of muramic acid TMS derivative mass spectrum’s base ion (m/z=185) used for quantification of bacterial peptidoglycan, J. Microbiol. Meth., 2002, 48, 267. [3] A. Saraf, L. Larsson, Identification of microorganisms by mass spectrometry, Advances in Mass Spectrometry, 1998, 14, 449. [38] Z. Mielniczuk, E. Mielniczuk, L. Larsson, Gas chromatography-mass spectrometry methods for analysis of 2- and 3-hydroxylated fatty acids: Application for endotoxin measurement, J. Microbiol. Meth., 1993, 17, 91. [80] Z. Mielniczuk, S. Alugupalli, E. Mielniczuk, L. Larsson, Gas chromatography-mass spectrometry of lipopolysaccharide 3-hydroxy fatty acids: comparison of pentafluorobenzoyl and trimethylsilyl methyl ester derivatives, J. Chromatogr., 1992, 623, 115.
Źródło:
Wiadomości Chemiczne; 2016, 70, 1-2; 95-117
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Secretion of proinflammatory cytokines by normal human melanocytes in response to lipopolysaccharide
Autorzy:
Tam, Irena
Stępień, Krystyna
Powiązania:
https://bibliotekanauki.pl/articles/1039839.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
lipopolysaccharide
melanocytes
proinflammatory cytokines
Opis:
A large body of evidence suggests that epidermal melanocytes are an integral part of the skin immune system and can be considered immunocompetent cells. Recently, it has been reported that human melanocytes constitutively express Toll-like receptors and may be involved in the induction of several inflammatory cytokines. In the study the secretion of IL-1β, IL-6 and TNF-α by cultured normal melanocytes was investigated after stimulation with lipopolysaccharide. LPS increased the secretion of IL-1β in a dose-dependent manner. IL-1β stimulated release of IL-6 and TNF-α by melanocytes, whereas LPS activated production of TNF-α, but not of IL-6. These observations indicate that LPS can participate in the regulation of cytokine activity in normal human melanocytes and suggest that cytokines released by melanocytes could affect melanocytes themselves or/and other cells of the epidermis.
Źródło:
Acta Biochimica Polonica; 2011, 58, 4; 507-511
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rola niefimbrialnych adhezyn: białek błony zewnętrznej i lipopolisacharydu w adhezji i inwazji bakterii do komórek gospodarza
The role of nonfimbrial adhesins: proteins of outer membrane and lipopolysaccharide in adherence and invasion of bacteria to host cells
Autorzy:
Szewczyk, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/1195585.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Przyrodników im. Kopernika
Opis:
Specific adhesion to host tissue cells is an essential virulence factor of most bacterial pathogens. Adherence is often an essential step in bacterial pathogenesis or infection, required for colonizing a new host. To effectively adhere to host surfaces, many bacteria produce multiple adherence factors called adhesins. There are two types of adhesins: fimbrial and nonfimbrial adhesins. Lipopolysacharide and outer membrane proteins belong to non fimbrial adhesins. The role of LPS in adherence of Gram-negative organisms to host cells has been evaluated for several bacterial species. The O-specific chain of bacteria can lead mostly to an increased tendency for this organism to bind to mammalian cells. The attachment of bacteria could be inhibited by purified LPS. A few receptors responsible for recognizing LPS have been identified: CD 14, scavenger receptor, Toll-like receptors, integrins, selectins. LPS receptors transduce signals from the membrane to the cytosol. Interaction between adhesins and their receptor can lead to invasion to host cells. Adhesins are attractive vaccine candidates because they are often essential to infection and are surface-located, making them readily accessible to antibodies.
Źródło:
Kosmos; 2010, 59, 1-2; 161-171
0023-4249
Pojawia się w:
Kosmos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rhizobium strains differ considerably in outer membrane permeability and polymyxin B resistance
Autorzy:
Komaniecka, Iwona
Zamłyńska, Katarzyna
Zan, Radosław
Staszczak, Magdalena
Pawelec, Jarosław
Seta, Irena
Choma, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1038773.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
rhizobium
outer membrane
lipopolysaccharide
N-phenyl-1-naphthylamine
NPN
polymyxin B
Opis:
Six rhizobium (Rhizobium leguminosarum bv. Trifolii TA1, Sinorhizobium meliloti 1021, Mesorhizobium huakuii IFO 15243T, Ochrobactrum lupini LUP 21T, Bradyrhizobium japonicum USDA110 and B. elkanii USDA 76) and two Escherichia coli strains (E. coli ATCC 25922 and E. coli HB 101) were compared in respect to polymyxin B and EDTA resistance, as well as bacterial outer membrane (OM) permeability to a fluorescent hydrophobic agent (N-phenyl-1-naphthylamine - NPN). TEM (Transmission Electron Microscopy) and a microbial test demonstrated that all the rhizobia were much more resistant to polymyxin B in comparison with E. coli strains. EDTA and polymyxin B enhance permeability of B. japonicum and O. lupini OM. Other rhizobia incorporated NPN independently of the presence of membrane-deteriorating agents; however, the level of fluorescence (measured as NPN absorption) was strain dependent.
Źródło:
Acta Biochimica Polonica; 2016, 63, 3; 517-525
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proteus mirabilis RMS 203 as a new representative of the O13 Proteus serogroup
Autorzy:
Palusiak, Agata
Siwińska, Małgorzata
Zabłotni, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1038887.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cross-reaction
lipopolysaccharide
O-polysaccharide
O serogroup
Proteus
Opis:
The unique feature of some Proteus O-polysaccharides is occurrence of an amide of galacturonic acid with Nε-[(S/R)-1-Carboxyethyl]-l-lysine, GalA6(2S,8S/R-AlaLys). The results of the serological studies presented here, with reference to known O-antigens structures suggest that GalA6(2S,8S/R-AlaLys) or 2S,8R-AlaLys contribute to cross-reactions of O13 Proteus antisera, and Proteeae LPSs. It was also revealed that the Proteus mirabilis RMS 203 strain can be classified into the O13 serogroup, represented so far by two strains: Proteus mirabilis 26/57 and Proteus vulgaris 8344. The O13 LPS is a serologically important antigen with a fragment common to LPSs of different species in the Proteeae tribe.
Źródło:
Acta Biochimica Polonica; 2015, 62, 4; 691-695
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proteomics profiles reveal the potential roles of proteins involved in chicken macrophages stimulated by Lipopolysaccharide
Autorzy:
Li, S.
Chen, Y.
Xue, W.
Wang, Q.
Huai, Z.
An, C.
Wang, Y.
Powiązania:
https://bibliotekanauki.pl/articles/16647586.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
chicken macrophage (HD11)
immune response
lipopolysaccharide (LPS)
proteomics
Opis:
Lipopolysaccharide (LPS), a core part of gram-negative bacteria, is crucial for inducing an inflammatory response in living things. In the current study, we used LPS from Salmonella to stimulate chicken macrophages (HD11). Proteomics was used to investigate immune-related proteins and their roles further. Proteomics investigation revealed 31 differential expression proteins (DEPs) after 4 hours of LPS infection. 24 DEPs expressions were up-regulated, while seven were down-regulated. In this investigation, ten DEPs were mainly enriched in S. aureus infection, complement, and coagulation cascades, which were all implicated in the inflammatory response and clearance of foreign pathogens. Notably, complement C3 was shown to be up-regulated in all immune-related pathways, indicating that it is a potential protein in this study. This work contributes to a better understanding and clarification of the processes of Salmonella infection in chickens. It might bring up new possibilities for treating and breeding Salmonella-infected chickens.
Źródło:
Polish Journal of Veterinary Sciences; 2023, 26, 2; 265-274
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protective role of endogenous nitric oxide (NO) in lipopolysaccharide - induced pancreatic damage. (A new experimental model of acute pancreatitis)
Autorzy:
Jaworek, J.
Jachimczak, B.
Bonior, J.
Kot, M.
Tomaszewska, R.
Karczewska, E.
Stachura, J.
Pawlik, W.
Konturek, S.J.
Powiązania:
https://bibliotekanauki.pl/articles/69269.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
acute pancreatitis
pancreatic damage
tumour necrosis factor-alpha
lipopolysaccharide
nitric oxide
pancreatic inflammation
Źródło:
Journal of Physiology and Pharmacology; 2000, 51, 1
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Omeprazole fails to suppress up-regulation of gastric mucosal endothelin-converting enzyme-1 by Helicobacter pylori lipopolysaccharide
Autorzy:
Slomiany, B.L.
Piotrowski, J.
Slomiany, A.
Powiązania:
https://bibliotekanauki.pl/articles/69480.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
omeprazole
sulglycotide
tumour necrosis factor-alpha
lipopolysaccharide
acute gastritis
gastric mucosa
ebrotidine
Helicobacter pylori
Źródło:
Journal of Physiology and Pharmacology; 2000, 51, 3
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Occurrence of lipopolysaccharide alterations among Tn5 mutants of Rhizobium leguminosarum bv. trifolii strain 24.1 with altered colony morphology
Autorzy:
Szyprowska, Sylwia
Choma, Adam
Głowacka, Maria
Gronek, Edyta
Kitlińska, Agnieszka
Rola, Marzena
Powiązania:
https://bibliotekanauki.pl/articles/1044758.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Biochemiczne
Źródło:
Acta Biochimica Polonica; 1998, 45, 4; 1001-1009
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microbiome impact on metabolism and function of sex, thyroid, growth and parathyroid hormones
Autorzy:
Kunc, Michał
Gabrych, Anna
Witkowski, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1038795.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
microbiome
lipopolysaccharide
estrogens
thyroid hormones
growth hormone
Opis:
Commensal bacteria and their genes associated with host are known as microbiome. In recent years, microbial influence on host endocrine system has been under detailed investigation. The role of microbiome in the pathogenesis of insulin resistance and obesity, the function of hypothalamic-pituitary-adrenal axis and secretion of hormones regulating appetite is well described in world literature. In this article we discuss poorly reviewed issues: the microbiome role in modulation of non-peptide (sex and thyroid) and peptide (growth hormone and parathyroid hormone) functions. Understanding complex bidirectional relations between host endocrine system and bacteria is of fundamental importance to understanding microbial impact on host reproduction, risk of endocrine-related cancers, pathogenesis of non-thyroidal illness syndrome, growth failure in children and hormonal changes during chronic kidney disease. This article also highlights effects of dietary compounds on microbiome composition and bacterial enzymes activity, and thus host hormonal status.
Źródło:
Acta Biochimica Polonica; 2016, 63, 2; 189-201
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 35

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